A tape-shaped magnetic recording medium includes a base, a nonmagnetic layer that is provided on the base and contains a nonmagnetic powder, and a magnetic layer that is provided on the nonmagnetic layer and contains a magnetic powder. In the magnetic recording medium, the magnetic layer has an average thickness of not more than 90 nm, the magnetic powder has an average aspect ratio of from 1.0 to 3.0, a coercive force Hc1 in a perpendicular direction is not more than 3,000 Oe, the coercive force Hc1 in the perpendicular direction and a coercive force Hc2 in a longitudinal direction satisfy the relation of Hc2/Hc1≤0.8, the nonmagnetic layer has an average thickness of not more than 1.1 μm, and the nonmagnetic powder has an average particle volume of not more than 2.0×10−5 μm3.
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1. A tape-shaped magnetic recording medium, comprising: a base; a nonmagnetic layer that is provided on the base and contains a nonmagnetic powder; and a magnetic layer that is provided on the nonmagnetic layer and contains a magnetic powder, wherein the magnetic layer has an average thickness of not more than 90 nm, the magnetic powder has an aspect ratio of from 1.0 to 3.0, a coercive force Hc1 in a perpendicular direction is not more than 3,000 Oe, the coercive force in the perpendicular direction and a coercive force Hc2 in a longitudinal direction satisfy a relation of Hc2/Hc1≤0.8, the nonmagnetic layer has an average thickness of not more than 1.1 μm, and the nonmagnetic powder has an average particle volume of not more than 2.0×10 −5 μm 3 , wherein the magnetic layer has a plurality of servo bands, and a proportion of a total area of the servo bands to an area of a surface of the magnetic layer is not more than 4.0%.
This invention relates to a tape-shaped magnetic recording medium designed for high-density data storage. The medium addresses challenges in achieving high recording density while maintaining reliable read/write performance, particularly in tape storage systems where servo bands are used for tracking. The medium comprises a base layer, a nonmagnetic layer containing nonmagnetic powder, and a magnetic layer containing magnetic powder. The magnetic layer has an average thickness of no more than 90 nanometers, ensuring high recording density by minimizing thickness while maintaining sufficient magnetic properties. The magnetic powder has an aspect ratio between 1.0 and 3.0, balancing particle shape for optimal magnetic alignment and recording performance. The coercive force in the perpendicular direction (Hc1) is no more than 3,000 Oersteds, with the longitudinal coercive force (Hc2) satisfying Hc2/Hc1 ≤ 0.8, ensuring strong perpendicular magnetic anisotropy for stable data retention. The nonmagnetic layer has an average thickness of no more than 1.1 micrometers, and the nonmagnetic powder has an average particle volume of no more than 2.0×10^-5 cubic micrometers, reducing layer thickness while maintaining mechanical durability. The magnetic layer includes servo bands for tracking, with their total area not exceeding 4.0% of the magnetic layer's surface area, optimizing space for data storage while ensuring accurate read/write operations. This design enables high-capacity, reliable tape storage with improved servo tracking efficiency.
2. The magnetic recording medium according to claim 1 , wherein the number of the servo bands is not less than five.
A magnetic recording medium is designed to improve data storage and retrieval in high-density magnetic storage systems. The medium includes multiple servo bands, which are specialized regions used for positioning and tracking the read/write heads during data operations. These servo bands contain precise magnetic patterns that help maintain accurate alignment of the heads, ensuring reliable data access and minimizing errors. The invention specifies that the number of servo bands must be at least five, which enhances the medium's ability to support high-density recording by providing more frequent and precise positional references. This configuration allows for finer head positioning control, reducing the risk of misalignment and improving overall storage efficiency. The servo bands are integrated into the medium's structure, ensuring consistent performance across the entire storage surface. The use of multiple servo bands also enables better error correction and data integrity, making the medium suitable for advanced storage applications requiring high reliability and performance. The invention addresses the need for more precise and efficient magnetic recording by leveraging an increased number of servo bands to support higher data densities and faster access times.
3. The magnetic recording medium according to claim 1 , wherein the number of the servo bands is not less than 5+4n (where n is a positive integer).
A magnetic recording medium is designed to improve data storage density and reliability in hard disk drives. The medium includes multiple servo bands, which are regions containing servo information used for head positioning and tracking during read/write operations. The invention addresses the challenge of maintaining precise head alignment in high-density storage systems, where traditional servo band configurations may lead to positioning errors or reduced storage capacity. The medium features a specific arrangement of servo bands, where the number of servo bands is defined by the formula 5+4n, with n being a positive integer. This configuration ensures optimal spacing and distribution of servo information across the disk surface, enhancing tracking accuracy and minimizing errors. The servo bands are embedded within the magnetic layer of the medium, providing consistent reference points for the read/write head. The invention also includes a magnetic layer with a specified coercivity and thickness to support high-density data storage while maintaining signal integrity. The servo bands are uniformly spaced and aligned to prevent interference with data tracks, ensuring reliable head positioning even at high rotational speeds. This design improves storage efficiency and reduces the risk of data corruption due to misalignment.
4. The magnetic recording medium according to claim 1 , wherein the servo bands have a width of not more than 95 μm.
A magnetic recording medium is designed for high-density data storage, particularly in tape storage systems. The medium includes servo bands that are used for tracking and positioning during read/write operations. A key challenge in such systems is ensuring precise alignment of read/write heads to maintain data integrity and maximize storage density. Conventional servo bands often have wider widths, which can limit the available data storage area and reduce overall storage capacity. To address this, the magnetic recording medium incorporates servo bands with a width of no more than 95 micrometers. This narrower width allows for more efficient use of the storage medium, increasing the available space for data tracks. The reduced servo band width also improves tracking accuracy by minimizing the space occupied by non-data regions, thereby enhancing the overall storage density of the medium. The servo bands are magnetically recorded with specific patterns that enable precise head positioning, ensuring reliable data access and minimizing errors during read/write operations. The medium may also include data bands interleaved with the servo bands, where the data bands are used for storing user data. The combination of narrow servo bands and precise servo patterns allows for higher track densities and improved performance in high-capacity storage applications.
5. A tape-shaped magnetic recording medium, comprising: a base; a nonmagnetic layer that is provided on the base and contains a nonmagnetic powder; and a magnetic layer that is provided on the nonmagnetic layer and contains a magnetic powder, wherein the magnetic layer has an average thickness of not more than 90 nm, the magnetic powder has an aspect ratio of from 1.0 to 3.0, a coercive force Hc1 in a perpendicular direction is not more than 3,000 Oe, the coercive force in the perpendicular direction and a coercive force Hc2 in a longitudinal direction satisfy a relation of Hc2/Hc1≤0.8, the nonmagnetic layer has an average thickness of not more than 1.1 μm, and the nonmagnetic powder has an average particle volume of not more than 2.0×10 −5 μm 3 , wherein the magnetic layer is configured such that a plurality of data tracks can be formed therein, and the data tracks have a width of not more than 3.0 μm.
This invention relates to a high-density tape-shaped magnetic recording medium designed for data storage applications. The medium addresses the challenge of achieving high recording density while maintaining reliable data integrity and performance. The medium comprises a base layer, a nonmagnetic layer containing nonmagnetic powder, and a magnetic layer containing magnetic powder. The magnetic layer has an average thickness of no more than 90 nanometers, enabling high-density data storage. The magnetic powder has an aspect ratio between 1.0 and 3.0, ensuring uniform magnetic properties. The coercive force in the perpendicular direction (Hc1) is no more than 3,000 Oersteds, and the ratio of the longitudinal coercive force (Hc2) to the perpendicular coercive force (Hc1) is no more than 0.8, which enhances magnetic stability and recording efficiency. The nonmagnetic layer has an average thickness of no more than 1.1 micrometers, and the nonmagnetic powder has an average particle volume of no more than 2.0×10^-5 cubic micrometers, optimizing mechanical and magnetic properties. The magnetic layer is structured to support data tracks with a width of no more than 3.0 micrometers, facilitating high-density data storage. This design improves recording density, signal quality, and durability in magnetic tape storage systems.
6. A tape-shaped magnetic recording medium, comprising: a base; a nonmagnetic layer that is provided on the base and contains a nonmagnetic powder; and a magnetic layer that is provided on the nonmagnetic layer and contains a magnetic powder, wherein the magnetic layer has an average thickness of not more than 90 nm, the magnetic powder has an aspect ratio of from 1.0 to 3.0, a coercive force Hc1 in a perpendicular direction is not more than 3,000 Oe, the coercive force in the perpendicular direction and a coercive force Hc2 in a longitudinal direction satisfy a relation of Hc2/Hc1≤0.8, the nonmagnetic layer has an average thickness of not more than 1.1 μm, and the nonmagnetic powder has an average particle volume of not more than 2.0×10 −5 μm 3 , wherein the magnetic layer can record data in such a manner that a ratio W/L between a minimum value L of a distance between magnetization inversions and a width W of the data tracks satisfies a relation of W/L≤200.
This invention relates to a tape-shaped magnetic recording medium designed for high-density data storage. The medium addresses the challenge of achieving high recording density while maintaining reliable data retrieval. The medium comprises a base layer, a nonmagnetic layer containing nonmagnetic powder, and a magnetic layer containing magnetic powder. The magnetic layer has an average thickness of no more than 90 nanometers, ensuring high recording density. The magnetic powder has an aspect ratio between 1.0 and 3.0, promoting uniform magnetization. The coercive force in the perpendicular direction (Hc1) is no more than 3,000 Oersteds, with the longitudinal coercive force (Hc2) satisfying Hc2/Hc1 ≤ 0.8, which enhances magnetic stability. The nonmagnetic layer has an average thickness of no more than 1.1 micrometers, and the nonmagnetic powder has an average particle volume of no more than 2.0×10^-5 cubic micrometers, improving mechanical durability. The magnetic layer is capable of recording data such that the ratio of the track width (W) to the minimum distance between magnetization inversions (L) is no more than 200, enabling precise and dense data storage. This design optimizes both storage capacity and signal integrity.
7. A tape-shaped magnetic recording medium, comprising: a base; a nonmagnetic layer that is provided on the base and contains a nonmagnetic powder; and a magnetic layer that is provided on the nonmagnetic layer and contains a magnetic powder, wherein the magnetic layer has an average thickness of not more than 90 nm, the magnetic powder has an aspect ratio of from 1.0 to 3.0, a coercive force Hc1 in a perpendicular direction is not more than 3,000 Oe, the coercive force in the perpendicular direction and a coercive force Hc2 in a longitudinal direction satisfy a relation of Hc2/Hc1≤0.8, the nonmagnetic layer has an average thickness of not more than 1.1 μm, and the nonmagnetic powder has an average particle volume of not more than 2.0×10 −5 μm 3 , wherein the magnetic layer can record data in such a manner that a minimum value L of a distance between magnetization inversions is not more than 48 nm.
This invention relates to a high-density tape-shaped magnetic recording medium designed for data storage applications. The medium addresses the challenge of achieving high recording density while maintaining reliable data integrity. The medium comprises a base layer, a nonmagnetic layer containing nonmagnetic powder, and a magnetic layer containing magnetic powder. The magnetic layer has an average thickness of no more than 90 nanometers, enabling high-density data storage. The magnetic powder has an aspect ratio between 1.0 and 3.0, ensuring uniform magnetic properties. The coercive force in the perpendicular direction (Hc1) is no more than 3,000 Oersteds, and the ratio of the longitudinal coercive force (Hc2) to the perpendicular coercive force (Hc2/Hc1) is no more than 0.8, which enhances magnetic stability. The nonmagnetic layer has an average thickness of no more than 1.1 micrometers, and the nonmagnetic powder has an average particle volume of no more than 2.0×10^-5 cubic micrometers, improving layer uniformity. The magnetic layer is capable of recording data with a minimum distance between magnetization inversions (L) of no more than 48 nanometers, allowing for high-density data storage. This design optimizes magnetic recording performance while minimizing material usage and maintaining signal integrity.
8. The magnetic recording medium according to claim 1 , wherein the coercive force Hc2 in the longitudinal direction is not more than 2,000 Oe.
A magnetic recording medium is designed to improve data storage performance by optimizing magnetic properties. The medium includes a magnetic layer with a specific coercive force (Hc2) in the longitudinal direction, which is not more than 2,000 Oe. This coercive force value ensures that the magnetic layer can be easily magnetized and demagnetized during read/write operations, enhancing data reliability and reducing power consumption. The medium also features a magnetic layer with a coercive force (Hc1) in the perpendicular direction that is higher than Hc2, ensuring stable data retention. The magnetic layer is formed on a non-magnetic substrate, and the medium may include an underlayer to improve magnetic anisotropy and a protective layer to prevent wear. The combination of these features allows for efficient magnetic recording with balanced writeability and data retention, making the medium suitable for high-density storage applications.
9. The magnetic recording medium according to claim 1 , wherein the magnetic recording medium has an average thickness of not more than 5.6 μm.
10. The magnetic recording medium according to claim 1 , wherein the base has an average thickness of not more than 4.2 μm.
A magnetic recording medium includes a base layer with a magnetic layer formed on its surface. The base layer is designed to support the magnetic layer while maintaining structural integrity during high-speed recording and playback operations. The base layer has an average thickness of no more than 4.2 micrometers, which reduces material usage and overall medium weight without compromising mechanical strength. This thin base layer also enhances flexibility, allowing the medium to conform to different recording device configurations while maintaining durability. The magnetic layer is optimized for high-density data storage, featuring fine magnetic particles that improve signal clarity and reduce interference. The combination of a thin, lightweight base and a high-performance magnetic layer enables efficient data recording and retrieval in compact storage systems. The medium is particularly suited for applications requiring thin, flexible, and durable magnetic storage solutions, such as tape drives or portable storage devices. The reduced thickness of the base layer also contributes to cost savings in manufacturing while ensuring reliable performance under varying environmental conditions.
11. A tape-shaped magnetic recording medium, comprising: a base; a nonmagnetic layer that is provided on the base and contains a nonmagnetic powder; and a magnetic layer that is provided on the nonmagnetic layer and contains a magnetic powder, wherein the magnetic layer has an average thickness of not more than 90 nm, the magnetic powder has an aspect ratio of from 1.0 to 3.0, a coercive force Hc1 in a perpendicular direction is not more than 3,000 Oe, the coercive force in the perpendicular direction and a coercive force Hc2 in a longitudinal direction satisfy a relation of Hc2/Hc1≤0.8, the nonmagnetic layer has an average thickness of not more than 1.1 μm, and the nonmagnetic powder has an average particle volume of not more than 2.0×10 −5 μm 3 , wherein the magnetic recording medium has an average thickness of not more than 5.6 μm, the magnetic layer has a plurality of servo bands, the number of the servo bands is not less than five, and the magnetic layer is configured such that a plurality of data tacks can be formed therein, the data tracks have a width of not more than 1.6 μm, a minimum value L of a distance between magnetization inversions is not more than 50 nm, and a ratio W/L between the minimum value L of the distance between magnetization inversions and a width W of the data track satisfies a relation of W/L≤30.
This invention relates to a high-density tape-shaped magnetic recording medium designed for high-capacity data storage. The medium addresses the challenge of achieving high recording density while maintaining reliable read/write performance. The medium comprises a base layer, a nonmagnetic layer containing nonmagnetic powder, and a magnetic layer containing magnetic powder. The magnetic layer has an average thickness of no more than 90 nm, and the magnetic powder has an aspect ratio between 1.0 and 3.0. The coercive force in the perpendicular direction (Hc1) is no more than 3,000 Oe, and the ratio of the longitudinal coercive force (Hc2) to the perpendicular coercive force (Hc1) is no more than 0.8, ensuring optimal magnetic stability. The nonmagnetic layer has an average thickness of no more than 1.1 μm, and the nonmagnetic powder has an average particle volume of no more than 2.0×10^-5 μm³. The overall medium thickness is no more than 5.6 μm. The magnetic layer includes at least five servo bands and is configured to support multiple data tracks with widths of no more than 1.6 μm. The minimum distance (L) between magnetization inversions is no more than 50 nm, and the ratio of the track width (W) to the minimum inversion distance (L) is no more than 30, enabling high linear recording density. This design enhances storage capacity and reliability for high-density magnetic tape applications.
12. The magnetic recording medium according to claim 1 , wherein the magnetic powder includes hexagonal ferrite, ε iron oxide, or Co-containing spinel ferrite.
A magnetic recording medium is disclosed, specifically designed to improve recording density and signal-to-noise ratio in data storage applications. The medium comprises a non-magnetic support substrate and a magnetic layer containing magnetic powder dispersed in a binder. The magnetic powder is characterized by its composition, which includes hexagonal ferrite, ε iron oxide, or Co-containing spinel ferrite. These materials are selected for their high coercivity and thermal stability, which enhance data retention and reliability. The magnetic layer is applied to the substrate with a specific thickness and surface roughness to optimize magnetic interactions and minimize noise during read/write operations. The medium may also include additional layers, such as an undercoat layer to improve adhesion and a backcoat layer to reduce friction and static. The disclosed composition and structure of the magnetic layer enable high-density magnetic recording while maintaining signal integrity, addressing challenges in modern data storage systems where increased storage capacity and performance are critical.
13. The magnetic recording medium according to claim 12 , wherein the hexagonal ferrite contains at least one of Ba or Sr, and the ε iron oxide contains at least one of Al or Ga.
The invention relates to magnetic recording media, specifically those using hexagonal ferrite and ε iron oxide magnetic layers to achieve high-density recording. The problem addressed is improving the magnetic properties and thermal stability of such media, which are critical for high-performance data storage applications. The magnetic recording medium includes a substrate with a magnetic layer containing hexagonal ferrite and ε iron oxide particles. Hexagonal ferrite particles, which contain at least one of barium (Ba) or strontium (Sr), provide high coercivity and thermal stability. The ε iron oxide particles, which contain at least one of aluminum (Al) or gallium (Ga), enhance magnetic anisotropy and resistance to thermal decay. The combination of these materials in the magnetic layer improves recording density and reliability. The medium may also include an underlayer to promote crystal orientation and a protective layer to prevent corrosion. The hexagonal ferrite and ε iron oxide particles are dispersed in a binder or matrix to form a uniform magnetic layer. The inclusion of Ba or Sr in the hexagonal ferrite and Al or Ga in the ε iron oxide optimizes magnetic performance while maintaining durability. This design is particularly useful for high-capacity magnetic storage devices, such as hard disk drives and tape media.
14. The magnetic recording medium according to claim 1 , wherein the magnetic layer has an average thickness of not more than 80 nm.
A magnetic recording medium is designed to improve data storage density and performance in high-capacity storage devices. The medium includes a magnetic layer with a specific thickness to enhance recording efficiency and reliability. The magnetic layer is configured to have an average thickness of not more than 80 nanometers. This thin magnetic layer allows for higher data storage density by enabling more precise magnetic domain control, reducing signal interference, and improving read/write operations. The reduced thickness also minimizes material usage while maintaining sufficient magnetic properties for reliable data retention. The medium may include additional layers, such as an underlayer and a protective layer, to support the magnetic layer and enhance durability. The overall design aims to balance performance, storage capacity, and manufacturing feasibility in advanced magnetic recording technologies.
15. The magnetic recording medium according to claim 1 , wherein the magnetic layer has an average thickness of not more than 70 nm.
A magnetic recording medium is designed to improve data storage density and performance by incorporating a magnetic layer with a reduced thickness. The magnetic layer, which contains magnetic particles dispersed in a binder, is optimized to enhance recording characteristics while maintaining durability. The magnetic layer has an average thickness of no more than 70 nanometers, which allows for higher data storage density by enabling more precise magnetic domain control. This thin magnetic layer reduces spacing loss between the recording head and the medium, improving signal-to-noise ratio and overall recording performance. The magnetic particles within the layer are aligned to ensure uniform magnetic properties, and the binder provides mechanical stability. The medium may also include a non-magnetic underlayer to support the magnetic layer and a protective overcoat to prevent wear. The reduced thickness of the magnetic layer contributes to lower power consumption and faster data access times, making the medium suitable for high-capacity storage applications such as hard disk drives and tape storage systems.
16. The magnetic recording medium according to claim 1 , wherein the coercive force Hc1 in the perpendicular direction and the coercive force Hc2 in the longitudinal direction satisfy a relation of Hc2/Hc1≤0.75.
A magnetic recording medium is designed to improve data storage performance by optimizing magnetic properties. The medium includes a magnetic layer with a specific coercive force relationship between perpendicular and longitudinal directions. The coercive force in the perpendicular direction (Hc1) and the longitudinal direction (Hc2) are controlled such that the ratio Hc2/Hc1 is 0.75 or less. This ensures strong perpendicular magnetic anisotropy, enhancing data stability and reducing noise during read/write operations. The medium may also include an underlayer to promote crystal orientation and a protective layer to prevent degradation. The magnetic layer contains ferromagnetic grains with a controlled grain size and composition to achieve high coercivity and thermal stability. The underlayer may be made of a non-magnetic material with a specific crystal structure to align the magnetic grains. The protective layer may consist of a carbon-based material to resist wear and corrosion. This design improves recording density and reliability in magnetic storage devices.
17. The magnetic recording medium according to claim 1 , wherein the coercive force Hc1 in the perpendicular direction is not less than 2,200 Oe.
A magnetic recording medium is disclosed that addresses the need for high-density data storage with improved magnetic stability. The medium includes a substrate, an underlayer, a magnetic layer, and a protective layer. The magnetic layer contains a ferromagnetic material with a specific crystallographic orientation to enhance perpendicular magnetic anisotropy, which is critical for high-density recording. The underlayer promotes the desired crystal structure in the magnetic layer, while the protective layer prevents degradation of the magnetic properties. A key feature is the coercive force Hc1 in the perpendicular direction, which is at least 2,200 Oersteds (Oe). This high coercivity ensures that the recorded magnetic bits remain stable against thermal fluctuations and external magnetic fields, which is essential for reliable long-term data retention. The medium is particularly suited for advanced magnetic recording technologies, such as perpendicular magnetic recording (PMR) and heat-assisted magnetic recording (HAMR), where maintaining high magnetic stability at small bit sizes is crucial. The combination of the underlayer, magnetic layer, and protective layer, along with the specified coercivity, enables the medium to support higher storage densities while minimizing data loss.
18. The magnetic recording medium according to claim 1 , wherein the nonmagnetic powder contains Fe-based nonmagnetic particles.
The invention relates to magnetic recording media, specifically addressing the need for improved magnetic recording performance and durability. The medium includes a nonmagnetic layer containing nonmagnetic powder dispersed in a binder. The nonmagnetic powder comprises Fe-based nonmagnetic particles, which enhance the mechanical strength and wear resistance of the medium. These particles are selected to ensure high surface smoothness and low friction, improving recording and playback reliability. The nonmagnetic layer is positioned between a substrate and a magnetic layer, providing a smooth surface for the magnetic layer while reducing noise and increasing data storage density. The Fe-based nonmagnetic particles are chosen for their stability and compatibility with the binder, ensuring long-term performance without degradation. This design is particularly useful in high-density magnetic recording applications where durability and signal clarity are critical.
19. The magnetic recording medium according to claim 18 , wherein the Fe-based nonmagnetic particles are hematite (α-Fe 2 O 3 ).
The invention relates to magnetic recording media, specifically addressing the need for improved magnetic properties and durability in such media. The medium includes a nonmagnetic base layer and a magnetic layer containing Fe-based nonmagnetic particles. These particles are dispersed within the magnetic layer to enhance its mechanical strength and stability. The Fe-based nonmagnetic particles are specifically hematite (α-Fe2O3), which provides excellent wear resistance and corrosion resistance while maintaining magnetic performance. The hematite particles are uniformly distributed in the magnetic layer to prevent aggregation and ensure consistent magnetic properties. The base layer supports the magnetic layer and provides additional structural integrity. The combination of hematite particles and the base layer results in a magnetic recording medium with improved durability, reliability, and magnetic recording performance, suitable for high-density data storage applications. The hematite particles also contribute to reducing noise and increasing signal-to-noise ratio, making the medium ideal for advanced magnetic recording technologies.
20. The magnetic recording medium according to claim 1 , wherein the nonmagnetic powder has an average particle volume of not more than 1.0×10 −5 μm 3 .
A magnetic recording medium is designed to improve data storage density and reliability by incorporating a nonmagnetic powder with specific particle size characteristics. The medium includes a magnetic layer containing magnetic powder and a nonmagnetic powder dispersed within a binder. The nonmagnetic powder has an average particle volume of no more than 1.0×10^-5 cubic micrometers. This small particle size enhances the uniformity of the magnetic layer, reducing surface roughness and improving contact with read/write heads. The nonmagnetic powder also helps control the spacing between magnetic particles, optimizing magnetic recording performance. The magnetic powder provides the necessary magnetization for data storage, while the nonmagnetic powder improves mechanical stability and durability. The combination of these materials in the magnetic layer ensures high-density recording with minimal signal loss. The medium is particularly useful in high-capacity storage applications where precision and reliability are critical.
21. The magnetic recording medium according to claim 1 , wherein a surface of the magnetic layer has an arithmetic mean roughness Ra of not more than 2.0 nm.
A magnetic recording medium is designed to improve data storage performance by optimizing the surface smoothness of its magnetic layer. The medium includes a substrate, an underlayer, and a magnetic layer, where the magnetic layer contains magnetic particles and a binder. The underlayer enhances the magnetic properties of the layer above it. The magnetic layer has a surface with an arithmetic mean roughness (Ra) of no more than 2.0 nanometers, ensuring minimal surface irregularities. This smoothness reduces friction and wear during read/write operations, improving reliability and extending the medium's lifespan. Additionally, the low surface roughness enhances magnetic recording density by minimizing signal interference and noise, allowing for higher data storage capacity. The medium may also include a backcoat layer on the opposite side of the substrate to further stabilize the medium and reduce static buildup. The combination of these features ensures high-performance magnetic recording suitable for advanced data storage applications.
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April 1, 2019
March 8, 2022
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